Read e-book online Electron Microscopy in Mineralogy PDF

By H.-R. Wenk (auth.), H.-R. Wenk (eds.)

During the final 5 years transmission electron microscopy (TEM) has extra a number of very important new facts to mineralogy and has significantly replaced its outlook. this can be partially since metallurgists and crystal physicists­ having solved lots of the structural and crystallographic difficulties in metals­ have began to teach a widening curiosity within the even more complex constructions of minerals, and in part to contemporary growth in experimental thoughts, frequently the supply of ion-thinning units. whereas electron microscopists became more and more drawn to minerals (judging from particular symposia at fresh conferences corresponding to 5th ecu Congress on Electron microscopy, guy­ chester 1972; 8 foreign Congress on Electron Microscopy, Canberra 1974) mineralogists have learned merits of the hot process and utilized it with expanding frequency. with a view to coordinate the becoming volume of analysis, electron microscopy classes were integrated in conferences of mineralogists (e. g. Geological Society of the US, Minneapolis, 1972, American Crystallographic organization, Berkeley, 1974). The large reaction for the TEM symposium which H. -R. Wenk and G. Thomas prepared on the Berkeley convention of the yankee Crystallographic organization shaped the root for this publication. It seemed helpful at this level to summarize the achievements of electron microscopy, scattered in lots of various journals in different diverse fields and current them to mineralogists. a gaggle of contributors because the Berkeley symposium shaped a piece of writing Committee and defined the content material of this book.

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Einftihrung in die Elektronenmikroskopie. M. von Heimendahl. Braunschweig: F. Vieweg 1970. Electron optical applications in materials science. E. Murr. New York: McGraw-Hill 1970. Modern diffraction and imaging techniques in materials science. S. Amelinckx, R. Gevers, G. Remaut and J. ). Amsterdam: North Holland Press 1970. Durchstrahlungs-Elektronenmikroskopie fester Stoffe. E. Hornbogen. Weinheim: Verlag Chemie 1971. Electron microscopy in materials science. ). New York: Academic Press 1971. Modern metallographic techniques and their application.

Remaut and J. van Landuyt), p. 257-294. Amsterdam: North Holland Press 1970. : The geometry and interfaces due to ordering and their observation in transmission electron microscopy and electron diffraction. Surface Science 31, 296-354 (1972). : Diffraction contrast from spherically symmetrical coherency strains. Phil. Mag. 8, 1083-1103 (1964). Ashby, M. , Brown, L. : On diffraction contrast from inclusions. Phil. Mag. 8, 1649-1676 (1964). : Useful properties of dark-field electron images. Phys.

4 of this volume). For partial dislocations, g. b can take non-integral values and some complexities arise due to dynamical effects. In the fcc structure especially when anisotropy is considered it has been shown that whereas g. b = ±1 is always an invisibility criterion, the case for g . b= leads to visibility or invisibility depending on the sign of s and the position in the foil (thickness dependence). These difficulties have been discussed by Clarebrough (1971). The Burgers vector of a partial dislocation is restricted by the displacement vector of the fault that it confines and this will aid in its determination.

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